PR123 "Open programming session"
How can i "Open programming session" on PR123 protection relay? Im able to read but i cannot poll because programming session is not started...
Modbus system interface PR123:
According to your attached manual, if you want to write single regiser or multiple registers through Modbus RTU. PR123 programming section has to be started.
According to Section 4.1 you have to start Programming Section. Also there is an example exist there.Plese see attached picture for details:
Hope it helps you.